Switching between JDK8 and JDK9 on Ubuntu

by Michał Łapacz

To switch to Java 8 run:

sudo update-java-alternatives --set /usr/lib/jvm/java-1.8.0-openjdk-amd64

To switch to Java 9 run:

sudo update-java-alternatives --set /usr/lib/jvm/java-1.9.0-openjdk-amd64